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An Irish word of an undefined and scrupulous origin. Notoriously difficult to use in a sentence due to the fact that no-one, Native Irish speakers included, actually knows what it means.

Seatach is unique amongst the Irish lexicon, as rather than being spoken consciously, it is primarily used in dreams, and by the sleeping. Upon waking, however, they will likely have no recollection of what context they used it in, or why.
"Someone called me seatach today, and I am unsure how to react." "Can't help you there, brother."
Seatach by Yerman Youngbuck June 11, 2022
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An Irish word of an undefined and scrupulous origin. Notoriously difficult to use in a sentence due to the fact that no-one, Native Irish speakers included, actually knows what it means.

Seatach is quite unique amongst the Irish lexicon, as rather than being spoken consciously, it is primarily used in dreams, and by the sleeping. Upon waking, however, they will likely have no recollection of what context they used it in, or why.
"Someone called me seatach today, and I am unsure how to react." "Can't help you there, brother."
Seatach by Yerman Youngbuck June 11, 2022
Related Words
I arrive in to SeaTac at 6pm.
SeaTac by Matt Weller February 5, 2007

SeaTac Mall 

The former name of a shopping center located in "Downtown" Federal Way. Currently known as The Commons at Federal Way, which is the dumbest name for a mall especially if you know about Federal Way.

It's the city's way of trying to seem more sophisticated, but who are we kidding, it's Federal Way y'all.

Real Federal Wayans still call it SeaTac. The term "The Commons" is only uttered sarcastically, with disdain or as a way of poking fun of the gangsta posers and wannabe scene kids.
Wanna go to the Seatac Mall?

You mean the Commons?

Fuck you.
SeaTac Mall by neverminder August 20, 2009

sextachment 

Forming an emotional attachment when just intercourse is involved
Erik and I hooked up a couple of times and he formed a sextachment? Thought we were just having fun!
sextachment by Krislynn5 February 15, 2014

SeaTac Steamer 

When staying at the worst hotel near the Seattle Tacoma Airport, taking a shit in the bathroom right before your friend's turn to take a shower.
I wouldn't go in there right now, Rope just dropped a SeaTac Steamer. Let's go get a roll of soggy old carpet from the pile outside and beat him with it.

seatcheck 

Calling "seatcheck" is alot like calling out "shotgun" in the fact that it is used to claim your: chair, sofa spot, futon, stair, whatever your seat may be, when you want to get up for a moment. It lets everyone around know that that spot, while vacant, is still occupied.
"Man, I'm thirsty. Seatcheck!"
seatcheck by chanda June 29, 2007